Friction device of damper disc

Abstract

The friction device of damper disc of the invention comprises an output member, an input member, springs for coupling the two, and friction mechanisms disposed between the input member and output member. The friction mechanism comprises annular input side and output side friction members, and the input side friction member is located between the output member and the output side friction member. At the edges of the both friction members, pawls extending in the axial direction are provided, and the pawls of the input side friction member are engaged with the notches provided in the input member to coupled the input side friction member and the input member in a manner unable to rotate relatively, and the pawls of the output side friction member are engaged with the notches in the output member couple the output side friction member and output member in a manner unable to rotate relatively, and sliding friction planes are formed between the output member and input side friction member, and the output side friction member and input member, respectively.

What is claimed is: 
     
       1. The friction device for a damper disc having an output member, with an annular flange and coupled to an output shaft, annular input side plates disposed concentrically and opposingly at the opposite sides of said output flange in the axial direction of said output shaft, said annular output flange and said input side plates being coupled in a circumferential direction of said output shaft by spring means, friction mechanisms disposed between said input side plates and said output flange, one of said friction mechanism disposed between said one of said annular input side plates and said annular output flange comprising a first annular, radially extending friction member having at least one axially extending pawl at its radial inner end extending into a notch at the radial inner end of said one of said side plates and preventing relative rotation between said first friction member and said one of said input side plates, a first friction washer between one annular surface of said first friction member and said annular output flange, a second annular, radially extending friction member having at least one axially extending pawl at its radial outer end and extending into a notch spaced radially outward from the radially inner end of said annular flange, said pawl on said second friction member extending over the radial outer end of said first annular, radially extending friction member and over the radial outer end of said first friction washer and preventing relative rotation between said second friction member and said annular output flange, a second friction washer between one annular surface of said second friction member and said one of said annular input side plates and a third friction washer between another of the annular surfaces of said first friction member and another of the annular surfaces of said second friction member.